(Video) From the 2015 World Science Festival: Birds do it, bees do it, rats and fruit flies and we do it—sleep, that is. But what is sleep? Why do we dream? And what goes on in sleeping brains—from the tiny fruit fly’s to ours? Find out as we watch the brain activity of a wired-up person sleeping offstage, learn about sleep’s many phases and discover the stunning result of not sleeping for days on end. Capping the program, Alan Alda will announce this year's Flame Challenge winners, those scientists whose explanations of sleep were voted best by our 20,000 eleven year-old judges.

Hey Younger Chemists! ChemChamps is back in 2015—and bigger than ever. You could be just two videos away from a trip to Washington, DC. Winners in DC will fly to the 250th ACS National Meeting in Boston, MA, in August 2015, to compete for the ChemChamps trophy!

A collection of articles that shines a light on UW-Madison's Department of Letters & Science, and their 111-year commitment to the Wisconsin Idea – the belief that our discoveries are shared to improve the lives of our community and the world.

If you would like to see the collection as it appeared in print, click here.

The biggest gap between public opinion and scientific consensus in the United States is not in the realm of vaccines, global warming or evolution but regarding the safety of genetically modified (GM) foods.